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// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
// SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
// SPDX-FileContributor: 2003-22 Bradley M. Bell
// ----------------------------------------------------------------------------
/*
// Old GetStarted example now used just for validation testing
*/
// BEGIN C++
// directory where cppad/cppad.hpp is stored must be searched by compiler
# include <cppad/cppad.hpp>
bool Poly(void)
{ bool ok = true;
// make CppAD routines visible without CppAD:: infront of names
using namespace CppAD;
// degree of the polynomial that we will differentiate
size_t deg = 4;
// vector that will hold polynomial coefficients for p(z)
CPPAD_TESTVECTOR(AD<double>) A(deg + 1); // AD<double> elements
CPPAD_TESTVECTOR(double) a(deg + 1); // double elements
// set the polynomial coefficients
A[0] = 1.;
size_t k;
for(k = 1; k <= deg; k++)
A[k] = a[k] = 1.;
// independent variables
CPPAD_TESTVECTOR(AD<double>) Z(1); // one independent variable
Z[0] = 3.; // value of independent variable
Independent(Z); // declare independent variable
// dependent variables
CPPAD_TESTVECTOR(AD<double>) P(1); // one dependent variable
P[0] = Poly(0, A, Z[0]); // value of polynomial at Z[0]
// define f : Z -> P as a function mapping independent to dependent
ADFun<double> f(Z, P); // ADFun corresponding to polynomial
// compute derivative of polynomial
CPPAD_TESTVECTOR(double) z(1); // vector length f.Domain()
CPPAD_TESTVECTOR(double) J(1); // vector length f.Range * f.Domain()
z[0] = 3.; // point at which to compute derivative
J = f.Jacobian(z); // value of derivative
// compare with derivative as computed by Poly
ok &= (Poly(1, a, z[0]) == J[0]);
return ok;
}
// END C++
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